Twin phonograph



l. NORIEGA.

TWIN PHONOGRAPH.

APPLICATION FILED JuLv 24,1919.

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l. NORIEGA.

TWIN PHONOGRAPH.

APPLICATION FILED II'ILYY24, I9I9.

Patented Nov. 9, 1920.

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I. NORIEGA.

' wlN- PHoNoGRAPH.

APPLICATION FILED .ILILY 24,1919.

1,358, 1 7 1. Patented Nov. 9, 1920.

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UNITED STATES INDALEGIO NORIGA,

PATENT OFFICE.

or MEXICO', MEXICO.

TWIN PHONOGRAPH.

To all whom t may concern.'

Be it known that I, INDALEGIO NORIEGA, subject of the King of Spain, residing at Mexico city, Federal District, Mexico, have invented certain new and useful Improvements in Twin Phonographs, of which the following is a specification.

This invention relates to a double phonograph for recording and reproducing musical works and the like continuously regardless of their length or duration, and to a commutator board by means of which the operation of the phonograph may be controlled at will; and its main object is to provide a means for recording musical works of any length on a series of successive disks.

Another object of the invention is to provide electrical connections between the phonograph and the commutator board from which either of the disk carriers or turntables can be brought into operation automatically and as desired.

The invention also comprises electrical means in the phonograph for stopping the motor, and other means for instantaneously changing the action of the motor from either one to the lother of the disk carriers.

I obtain these results by means of the construction shown in the accompanying drawings in which:

Figure 1 is a front elevation, partly in section of the double phonograph;

Fig. 2 is a plan of the same;

Fig. 3 is an elevation of the double phonoi graph showing the forked tone arm;

Fig. 4 is a front elevation of the disk carrier shaft and its supports;

Fig. 5 is a side elevation of the same.

Fig. 6 is a vertical transverse section of the forked horn showing the changeable damper;

Fig. 7 is a plan of an engraved disk;

Fig. 8 is a diagram of thecommutator boarill1 showing its connections to the phonograp Referring to the figures: (1) is the bottom of the case or box on which is mounted motor (2), provided with a hollow feathered shaft (3) extending through the motor. On shaft (3) slide clutches (4) meshing with worm gears (5), which revolve in bearings (7) and which transmit motion selectively to either of the two vertical shafts (6") or (6b) of the disk carriers or turntables. Said clutches are connected to the cores of sole- Specication of Letters Patent.

Patented Nov. 9, `1920. 1919. serial No. 313,072.

noids (8a) and (8b) by means of suitable rods mounted to slidably revolve in the i and are further su ported in bearmgs (91 flexibly mounted on these bearin s (9a) and (9") and project into channels 11) on the clutches, so as to keep the latter from slipping longitudinally along shaft (3).

Standards (12) are disposed opposite to worm gears (5) and carry shafts (6a) and (6b), which are provided with cog-wheels (13a) and (13b) to be operated by said worm gears (5). These shafts are provided at their upper extremities with cones (14), on which are mounted the disk carriers (15) provided with ribs (16), the hubs (17) of said disk carriers fitting over said cones (14) and resting on collars (18) of shafts (6a) and (6b). Disk carriers (15) are pierced by contact projections (19a) and (19), which toward their lower extremities terminate in contact brushes (20a) and (20), which sweep annular metal plates (21a) and (2lb), which are electrically connected with binding posts (22B) and (22h) on the under side off'top (23) of the case of the phonograph. This cover (23) is longitudinally divided into two sections so as to facilitate the taking down of the apparatus, and each of these sections has a spring contact (92) and. (90) to allow for the rapid connection of the wires of the electric circuit.l

On cover (23) of the case is mounted a tubular support (25) for carrying the bifurcated tone arm (26), whose two branches arejoined by a union (27), which carries lthe horn (not shown) and in the interior of which is made to oscillate a damper (28), which may be moved from one opening to the other. Said damper has rigidly connected to its lower-portion an arm (29) which is fixed to a small stud or axle (30) axle fixed on the interior of the case of the phonograph, as may be seen in Fig. 1. Another wire (37)-, also eccentrically fixed to disk (36), connects it with reversing lever '(39). Lever (39) is provided with adjustment perforations at one end and, at the other, with a notch (40) which engages flange (41) of the core of the solenoid (8b), which latter can, therefore, transmit movement to the damper and cause it to cut out' either branch of the tone arm according as either side (a) or (b) is being operated. Branches (26) of tone arm termmate in reproducing or recording diaphragms (42a) `and (42"), with needles (43).

,commutator board, the current passing through post (50), to (51), thence to post 52 in the phonograph case, to (53 and 54 entering the motor at (55). nterruptible current, from the other pole (B) is taken from post (56) on the commutator board thence through (57) and (58) toswitch (59), through (60) to post (61) on the` phonographcase, .through the usual starting and stopping push button contacts (62) and (63), to (64) and (65), enteringf the motor at (66) and establishing the circuit.

` Current for energizing solenoid coil (8a) is taken from line (A) at post (54) in the phonograph case and enters the coil at (76), while the indirect connection is made to line (B) at (65), whence it passes through wire (65') and contact (71) to the base plate (72) of the tubular support (25), Fig. 3, from where it is taken by wire (73) to the metal portion of reproducer (42h) as indicated in Fig. 3; it then passes through brush (45) to contact (19) and metal brush (20), then through plate (2lb), post (22J'), and wire (90')^ to contact (90) and thence by wire (902) to post (74) and enters the coil at (75).

Current for energizing solenoid coil (8") is taken through direct connections from line (A) at (53) and enters the coil at (81). The

indirect connection to line (B) is made from plate (72), through wire (77) to reproducer 42a) then to brush (45a), post (19a), brush 20a), plate (21a), post (22a) and wire (92') to contact (92 and thence through wire (922) to Contact (78) and enters the coil at (80) completing the circuit.

In order to cause either side (a) or (b) to be operated from the commutator board while moto-r (2) is inactive, the following installation will be used: the motor being already directly connected to (A) connection will be taken fromline (B), should it be desired to energize coil (8a), at post (56), through (57') and (82) to push button contact (83) and post (84), all on the board, and to post (85) on the case of the phonograph, thence to (74) and into the coil at phonograph,'through 8) and into the coil at (80), thus completing the circuit.

In order to energize either of coils (a) or (b) from the phonograph itself, push button contact (89), which receives current from plate (72), is operated and current passes to spring contact (90), then through wire (902) to post (74) and into coil (8a) at (75).

To energize coil (8b), push button contact (91) is operated and current passes from plate (72) through spring contact (92) and wire (922) to post (78) and into coil (8?) at (80).

From the foregoing description of the electrical connections it will be readily understood that when'the needle of the re roducer or the recorder, as the case may be, as traveled over the grooved zone of the record on side (b) of the phonograph the brush (45) establishes contact with the brush (20), and the clutch of the opposite side is automatically brought into mesh and the second disk begins to revolve, thus continuing the reproduction on the second disk; when the latter has run its course, contact is established through the brushes (45a) and (20a) and the first side begins to revolve again, and so on continuously, there being ample time for the concluded disk to be replaced by a new one, either for recording or reproducing, regardless of the duration of the composition.

Having thus fully described 'my invention what I claim is: f

1. In a twin phonograph, the combination of a pair of recordsupports ;v a single motor; driving connections between the motor and each support, each driving connection including a clutch; a tone arm individually coperative with each carrier; automatic mechanism for simultaneously opening one clutch and closing the other when either tone-arm reaches the end of its travel over a record on the associated support; and mechanism operable automatically simultaneously-with vthe operation of both clutches for blocking the delivery end of the tone' arm which has completed its travel.

2. In a twin phonograph, the combination of a pair of record supports; a single motor; driving connections between the motor and each support, each driving connection including a clutch; a tone arm individually coperative with each carrier; automatic mechanism for simultaneously opening one clutch and closing the other when either tone arm reaches the end of its travel over a record on the associated supporti; damper mechanism common to both tone arms for blocking the delivery ends thereof in alternation; and mechanism operable automatically simultaneously with the clutch-operating mechanism for actuating the damper mechanism.

3. In a twin phonograph, the combination of a pair of record supports; a motor for driving them; electro-magnetically operated clutches for controlling the motor drive; a tone arm individually coperative with each support; mechanism for automatically opening either clutch and simultaneously closing the other, whereby the motor is enabled to drive said supports in alternation; damper mechanism associated with said tone arms to open or close their delivery ends to the passage of sound waves therethrough; and a mechanical device connected immediately to the magnet of one of said clutches for actuating the damper mechanism.

4. In a twin phonograph, the combination of a pair of record supports; mechanism for driving them in alternation; a tone arm individually coperative with each support; a damper common` to ,both tone arms for blocking the delivery ends thereof; a flexible operating element connected to the damper; and connecting means between the driving mechanism and the damper operating element for automatically exerting a pull upon the latter to actuate the same each time the drive is shifted from one support to the other.

5. In a twin phonograph, the combination of a pair of record supports; mechanism for driving them in alternation; atone arm individually coperative with each support;

a damper connnon to both tone arms for blocking the delivery ends thereof; a flexible operating element connected to the damper; a. pivotally mounted disk to which said fiexible operating element is eccentrically connected; and a flexible connection between said disk and said driving mechanism for automatically turning the disk each time the drive is shifted from one support to the other, to actuate said flexible operating element and said damper. l

6. In a twin phonograph, the combination of a pair of record supports; a motor for driving them; a tone arm individually coperative With each support; a pair of alternately-acting electro-magnetic devices for periodically shifting the driveI from one support to the other; said devices having their activity reversely4 changed simultaneously; a damper common to both tone arms p for blocking the delivery ends thereof in alternation; and a mechanical connection between 'one of said electro-magnetic devices and said damper for automatically actuating the latter each time the drive is shifted.

7. In atwin phonograph, the combination of a pair of record supports; a motoi` for driving them; a tone arm individually coperative with each support; a pair of alternately-acting electro-magnetic devices for periodically shifting the drive from one support to the other; a damper common to both tone arms for blocking the delivery ends thereof in alternation; a rocking element directly connected to one of said electromagnetic devices to be operated thereby each time the drive is shifted; and a flexible operating connection between saidY rocking element and said damper.

8. In a twin phonograph, the combination of a pair of record supports; a motor; an electrical system for driving said supports in alternation from the motor and including a circuit for the motor; Va controller board to which the terminals of the motor circuit are connected; and devices carried by said board for eifectingan initial selective drive of either support. v v

9. In a twin phonograph, the combinatio of a pair of record supports; a motor; an electrical system for driving said supports in alternation from the motor and including a circuit for the motor and a pair of electromagnetic devices or determining the support to be driven; a controller board to which the terminals of the motor circuit are connected; and means carried by said board for selectively energizing either electro-magnetic device to effect an initial drive of the associated support.

10. In a twin phono raph, the combination of a pair of recor supports; amotor; an electrical system for driving -said supports in alternation from 4the motor and including a circuit for the motor; means for closing and opening the motor vcircuit to start and stop the drive; a controller board to which the terminals of the motor circuit are connected; and means carried by said board for effecting an initial selective drive of either support.

11. In a twin phonograph, the combina-V tion of a'pair of record supports; a motor; an electrical system for driving said supports in Valternation from the motor and including a circuit for the motor and a. pair of electro-magnetic devices for determining the support to be driven; means for closing and opening the motor circuit to start and stop, the motor; and means for selectively energizing either electro-magnetic device to effect an initial drive'of the A associated support. v

In testimony whereof I have aixed my signature.

INDALEcIo NoRIEGA. 

